(E,E)-3-Methyl-5-(2,6,6-trimethyl-1-cyclohexen-1-yl)-2,4-pentadienoic acid 14398-42-6 2,4-Pentadienoic acid, 3-methyl-5-(2,6,6-trimethyl-1-cyclohexen-1-yl)-, (E,E)- C15 acid RO 4-6230 all-trans-5-(2,6,6-Trimethylcyclohexen-1-yl)-3-methylpenta-2,4-diene-1 acid